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A can do a piece of work in 15 days and ...

A can do a piece of work in 15 days and B alone can do it in 10 days. B works at it for 5 days and then leaves. In how many days, A alone can finish the remaining work?

A

`7 days`

B

`7 (1)/(2)` days

C

8 days

D

`8 (1)/(2)`days

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The correct Answer is:
B
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